The performing siblings take to the stage and stun the judges with their death defying roller skating act.

"Oh my God," shouts Amanda, as Emily is thrown around on stage.

Watch the video above to see the intense act and the funny reaction.

Billy and Emily England from Birmingham, one of the acts taking part in the ITV1 talent show, Britain's Got Talent, which starts this Saturday. (Photo: PA)

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With returning TV favourites Ant and Dec, the lucky act who is crowned the winner in the live grand final will secure a life changing cash prize of £250,000 and the opportunity to perform at this year’s The Royal Variety Performance.